In case you were wondering, it is possible to tunnel through a compost heap. And the Patagonia Better Sweater™ Zip-Neck comes out no worse for the wear. Made of durable and filth-resistant 100% polyester, it has a soft and warm fleece interior and a sweater-knit face that civilizes even the most feral of dirtbags. The zipper has an internal wind flap and zipper garage, and brushed polyester jersey lines the stand-up collar and reinforces the cuffs and hem. With a zippered chest pocket.